@GossiTheDog and people are still sleeping on the fact that this is not some 'small fry' company. "TM_SGNL" can reasonably be assumed to reflect the practices of OTHER products at parent company Smarsh. Which is actually a fairly large player in the compliance archiving space.
Which tells me that there's a non-zero chance their other products (which are all SaaS) have similar 'security' practices.
Just what you want from a company selling you 'Conduct Surveillance.'